Detachable share for the teeth of cultivator and scarifier implements.



T. C. LAWFORD.

DETACHABLE SHARE-FOR THE TEETH 0F CULTIVATOR AND SCARIFIER IMFLEMENTS.

APPLICATION man 050.3, 1917.

Patented Feb. 5, 1918.

INVENTUF: 7710MA5 6. LAWFUR THOMAS C. LAWFORD, OF CROYJDON, VICTORIA,AUSTRALIA.

DETACHABLE SHARE FOR THE TEETH Specification of Letters Patent.

OFCULTIVATQR AND SCARIFIER IMPLEMENTS.

Patented Feb. 5, 191%..

Application filed December 3, 1917. Serial No. 205,047.

f0 all whom it may concern:

Be it known that I, THOMAS CAREY LAwronn, a subject of the King of GreatBritain, residing at Hewish Road, Croydon, in the State of Victoria,Commonwealth of Australia, have invented new and useful Improvements inDetachable Shares for the Teeth of Cultivator and Scarifier Implements,of which the following is a specification.

This invention relates to a detachable share for agricultural implementsand it has been devised in order to provide a simple and economicallyconstructed share. For such implements it is highly eflicient incultivating the .soil and cutting the roots of and ralsing all weeds tothe surface of the soil.

The share is strong and durable in construction and is designed to passthrough the soil with little friction thereby making an implement fittedwith the same very light of draft. Moreover, the wearing parts of theshares can be readily detached when worn and replaced at a very lowcost.

A share constructed in accordance with the present invention consistsessentially of a cutting blade which is fitted detachably to theunderside of the tine and a detachable wearing point or stem extendingforwardly of the blade. The blade and the wearing point are securedrigidly to the tine by a bolt or the like.

The invention is particularly adaptable to spring tines of cultivatorsand scarifiers but it can be fitted to rigid tines.

In order that the invention may be readily understood reference will nowbe had to the accompanying sheet of explanatory drawings, wherein--Figure 1 is a view in perspective of portion of a spring tine fittedwith a share constructed in accordance with the invention.

Fig. 2 is a view showing the invention in side elevation fitted to atine.

In the drawings the reference letter a designates the blade and theletter Z) the wearing point of the share. The wearing point I) ispreferably made of a short piece of flat spring steel and its rear endis shaped to lie flat upon the tine and its front end is rounded'andpointed in an approved way.

The rear end of the point l is formed With depending side lugs d whichare adapted to fit against the sides of the tine.

The blade part a is made of a flat piece of steel and is shaped withparallel front and rear edges and the front parallel edge isapproximately the same width as the detachable wearing point.

when the nut on the bolt 6 is screwed upv tightly.

The rear part of the blade a is set more or less horizontally and itsside edges preferably incline rearward and are sharpened to provide agood cutting edge.

The share is prevented from rocking on the tine by arranging the lowerend of the latter to bear against the upper surface of the blade nearthe wearing point.

The wearing point can be removed readily when it desired to re-sharpenthe same and the blade can be easily removed and replaced by a new onewhen. worn. The forward part of the blade a in advance of the bolt isformed with two upstanding lugs g which are adapted to bear against thesides of the tine and with the bolt 6 effectually prevents any lateralmovement of the blade when subjected to adverse strains in use.

The point of the share enters and passes freely through the soil and theblade portion formed by the second part cuts through the roots of allweeds and grass and prevents their growth.

The invention can be designed to suit different types of cultivators andscarifiers and in use will be found thoroughly efiicient for thepurposes for which it has been devised.

What I do claim is 1. A share for the tines of scarifiers, cultivatorsand the like implements comprising a detachable flat blade portionhaving upstanding lugs adapted to lie against the sides of a tine, and adetachable wearing point having its rear part shaped to conform to theupper surface of the tine and its front end sharpened to a cutting edge,

7 2. A share for the tines of scarifiers, cultivators andthe likeimplements comprising in combination, a fiat blade portion havin a holenear its front edge, upstanding lugs on the blade in advance of the holeto embrace opposite sides of the tine, a Wearon the'wearing point at therear of the hole therein to embrace opposite sides of the tine.

3. In a sharefor the tines of scarifiers,

' cultivators and the like implements a flat blade portion having a holenear theiront thereof and inclined cutting edges, and upstanding lugs inadvance of the hole to embrace opposite sides of the tines.

In a share for the tines of scarifiers, Cultivators and the likeimplements a Wearing point having its rear end shaped to conform to andpartially embrace the tine and its front end sharpened to a cuttingedge, substantially as described and for the purposes herein set forth.

In testimony whereof I aflix my signature in presence of two witnesses.

' T.- C. LAVFORD.

WVitnesses:

- ARTHUR G. L. Nnrennoon. 1 JAMES H. ANDERSON.

Copies of this patent may be obtained for five cents each, by addressingthe "Commissioner of Patents,

' Washington, D. G.

